The case in one breath
A 14-year-old cheerleader didn’t make varsity, posted a profanity-filled Snapchat from a convenience store on a Saturday, and got suspended from her team for a year. In 2021, the Supreme Court ruled 8–1 that the school violated the First AmendmentFirst Amendment: the constitutional rule that stops the government — including public schools — from punishing your speech. Private schools aren’t the government, so it doesn’t bind them. — declaring that outside school, students’ speech belongs to them and their parents, not the principal. Off-campus venting is protected. Threats, serious harassment, and cheating still aren’t.
Decided
June 23, 2021
Vote
8–1
Opinion by
Justice Breyer
Protects
Off-campus speech
The Story
It started with a cheerleading tryout in a small Pennsylvania town — and ended with the most important student-speech ruling in fifty years.SPRING 2017Brandi Levy, a freshman at Mahanoy Area High School, tries out for varsity cheer. She doesn’t make it — she’s offered another year on junior varsity while an incoming freshman gets a varsity spot. She is, in her own words later, “really upset.”
THAT WEEKENDAt the Cocoa Hut, a local convenience store, Brandi posts to her Snapchat story — visible to about 250 friends for 24 hours. The photo: Brandi and a friend, middle fingers raised. The caption: F-bombs aimed at school, softball, cheer, and “everything.”
DAYS LATERSnapchats disappear; screenshots don’t. A teammate captures the post, it reaches the cheer coaches, and Brandi is suspended from JV cheer for the entire year for violating team and school rules.
2017–2020Her family sues the district with ACLU backing — and unlike the Tinker family, wins at every level. The district court sides with Brandi; the Third Circuit affirms. The school district appeals to the Supreme Court, which takes the case because courts nationwide need an answer to the defining modern question: does school authority follow students onto their phones at home?
JUNE 2021The Court rules 8–1 for Brandi. A vulgar weekend Snapchat, causing no real disruption, is protected speech — and a school that punishes it violates the Constitution.
The Question the Court Faced
Since Tinker (1969), schools have been able to punish student speech that causes a substantial disruptionSubstantial disruption: the Tinker test — real, material interference with the school’s work or other students’ rights. Gossip, brief chatter, and annoyed adults don’t count. — but Tinker was about speech at school. The question here: does that power extend to speech made off campus, on a student’s own phone and own time? The school argued yes — in the social media age, posts land on campus instantly, so the location of the poster shouldn’t matter. Brandi’s lawyers argued that rule would put students under school speech control 24 hours a day, everywhere, forever. The Court had to draw the line for the smartphone era.
What the Court Decided
Brandi won — and the opinion gave student rights their most quotable line since the schoolhouse gate:“America’s public schools are the nurseries of democracy.”— Justice Breyer, for the Court
The Court gave three reasons schools rarely control off-campus speech. First: away from school, the doctrine that lets schools act like parents — in loco parentisIn loco parentis: Latin for “in the place of a parent” — the legal idea that gives schools parent-like authority over students during the school day. Off campus, it mostly switches off. — largely switches off; weekend speech is a matter for actual parents. Second: if schools could regulate speech on campus AND off, they’d regulate everything a student says, around the clock — and courts must be deeply skeptical of that. Third: schools exist to train citizens for democracy, which means protecting unpopular expression, not erasing it:
“Schools have a strong interest in ensuring that future generations understand the workings in practice of the well-known aphorism, ‘I disapprove of what you say, but I will defend to the death your right to say it.'”— on why protecting even crude speech is the school’s job
Applied to Brandi: her posts were crude, but they criticized the team and school — core protected expression — from a personal phone, off campus, naming and threatening no one. The “disruption”? A few minutes of class chatter and some upset teammates. Nowhere near Tinker’s bar. But the Court deliberately did not declare off-campus speech untouchable: schools keep authority over off-campus true threats, serious bullying or harassment of specific people, cheating, and hacking school systems. Justice Thomas dissented alone, arguing 150 years of history let schools discipline speech that harms the school environment — the argument districts still cite when testing this ruling’s edges.
What It Means for You
✓ BECAUSE OF MAHANOY
- Your off-campus posts — venting, criticism, profanity, unpopular takes — are protected from public school punishment
- “It was seen at school” isn’t enough; real substantial disruption is required
- Team and club rules can’t override the Constitution — this WAS a team-rules case
- Off campus, your parents are in charge of your speech — not your principal
✗ MAHANOY DOESN’T MEAN
- Threats are protected — they’re a police matter, everywhere, always
- Targeted bullying or harassment of specific people is safe — it isn’t
- Cheating or hacking from home is untouchable — schools can still act
- School devices and accounts are “off campus” — school rules travel with school hardware
- Private schools must follow it — the First Amendment binds government schools
Questions People Ask About This Case
Who is B.L. — and why isn’t her name in the case title?
B.L. is Brandi Levy. She was a minor when the case began, so courts used her initials — standard practice to protect underage parties. By the ruling she was in college and spoke publicly about it, becoming a kind of free-speech icon: the teenager whose worst Snapchat made constitutional history.
Why did Brandi win when the “BONG HiTS 4 JESUS” student lost?
Location. In Morse v. Frederick (2007), the banner was unfurled at a school-supervised event — legally, that counts as “school.” Brandi spoke at a convenience store on a weekend, connected to school only by topic. Speaking about school doesn’t put you at school. That distinction decided both cases.
Did the Court draw a clear line for all future cases?
Deliberately not — Justice Breyer wrote that the Court was leaving future cases to future courts, listing the categories schools can still reach (threats, serious harassment, cheating, hacking) without defining their exact edges. Federal appeals courts have been mapping those edges since, generally upholding discipline only for severe, targeted attacks on specific people.
Does Mahanoy protect private school students?
No. The First Amendment restrains the government, and public schools are the government — private schools aren’t. Private school students’ speech rights come from the enrollment contract, the handbook, and state law. Same for private colleges.
What does this mean for my posts, practically?
On your own phone, account, and time: criticize your school, vent about a coach, post what adults hate — a public school punishing that is breaking the Constitution. Never protected: threats (police, not just principals), harassment campaigns against real people, cheating, or anything on school devices and accounts. The full practical guide: Can your school punish you for what you post outside school?
Words in This Case, Explained
First Amendment — limits government restrictions on speech; binds public schools, not private ones.
In loco parentis — “in the place of a parent”; the source of school authority that largely ends at the school door.
Substantial disruption — the Tinker standard: real interference with school functioning, not discomfort or gossip.
Majority opinion — the controlling decision; written here by Justice Breyer for eight justices.
Dissent — a justice’s written disagreement; Justice Thomas dissented alone.
Precedent — a decided case that binds future courts; Mahanoy is now THE precedent for off-campus student speech.
Cases Connected to This One
Tinker v. Des Moines (1969)The foundation Mahanoy builds on: students don’t shed their rights at the schoolhouse gate. Read the full breakdown →
Bethel v. Fraser (1986)The on-campus vulgarity rule — Brandi’s language was punishable at a school assembly under Fraser; at the Cocoa Hut, it was hers. Location decided everything.
Morse v. Frederick (2007)The “BONG HiTS 4 JESUS” case: school-supervised events count as school, even across the street.
Riley v. California (2014)The other side of your phone’s legal life — not what you say on it, but who can search it. Read the full breakdown →
What’s Still Undecided
Mahanoy is young, and its edges are live battlegrounds as of mid-2026:
- Where harassment begins — the Court kept school power over “serious” off-campus bullying without defining serious. Circuits are mapping it case by case; the Supreme Court will likely have to return.
- AI and deepfakes — students generating fake images of classmates and teachers is the new frontier; no Mahanoy argument protects those, and states are criminalizing them fast.
- School-monitored accounts — districts scanning school devices 24/7 quietly moves the “off-campus” line onto whoever owns the hardware. Privacy challenges are just starting.
Why this page exists: most summaries of Mahanoy are written for law students. This one is written for the students the case is actually about. Every fact above comes from the Court’s own opinion — linked below so you can check us.
The Bottom Line
Tinker promised in 1969 that students don’t shed their rights at the schoolhouse gate. Mahanoy answered the question Tinker never imagined: what happens when the gate is a phone in your pocket? Eight justices to one: your off-campus voice belongs to you. A freshman who lost a tryout, posted her worst moment, and refused to accept the punishment ended up protecting the speech of 50 million American students. Now you know.Your practical guideCan your school punish your posts? →
The foundationTinker v. Des Moines →
More casesBrowse all court case files →
Sources
Primary sources:- Mahanoy Area School District v. B.L., 594 U.S. 180 (2021) — full opinion — supremecourt.gov
- Mahanoy v. B.L. — argument audio and case summary — oyez.org
- Harvard Law Review — case analysis — harvardlawreview.org
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